摘要
目的探讨米诺环素(MC)调节缺氧诱导因子1α(HIF-1α)/B淋巴细胞瘤-2/腺病毒E1B 19-kDa相互作用蛋白(BNIP3)信号通路对慢性心力衰竭(CHF)大鼠心肌细胞损伤的影响。方法将大鼠随机分为假手术组、CHF组、阳性药物(LP)组、MC低剂量(LMC)组、MC高剂量(HMC)组、HMC+HIF-1α激活剂(DMOG)组。采用超声心动图检测心功能;采用HE染色、透射电镜、TUNEL法检测心肌组织病理形态及细胞凋亡情况;采用酶联免疫吸附试验(ELISA)检测肿瘤坏死因子α(TNF-α)、白细胞介素(IL)-1β、超氧化物歧化酶(SOD)、丙二醛(MDA)水平;采用实时定量PCR检测Bcl-2、Bcl-2相关X蛋白(Bax)mRNA水平;采用Western blotting检测HIF-1α、BNIP3、Beclin-1、微管相关蛋白1轻链3(LC3)蛋白表达。结果与假手术组相比,CHF组大鼠左心室舒张末期内径(LVEDD)、左心室收缩末期内径(LVESD)、细胞凋亡率、TNF-α、IL-1β、MDA、Bax、HIF-1α、BNIP3、Beclin-1、LC3Ⅱ/Ⅰ水平升高,左室射血分数(LVEF)、左心室缩短分数(LVFS)、SOD、Bcl-2水平降低(P<0.05);与CHF组相比,LP组、LMC组和HMC组大鼠LVEDD、LVESD、细胞凋亡率、TNF-α、IL-1β、MDA、Bax、HIF-1α、BNIP3、Beclin-1、LC3Ⅱ/Ⅰ水平均降低,LVEF、LVFS、SOD、Bcl-2水平升高(P<0.05);DMOG可减弱高剂量MC对CHF大鼠心肌细胞损伤的改善作用(P<0.05)。结论MC通过抑制HIF-1α/BNIP3信号通路,改善CHF大鼠心肌细胞损伤。
Objective To investigate the impact of minocycline(MC)on myocardial cell damage in rats with chronic heart failure(CHF)by regulating the hypoxia-inducible factor 1α(HIF-1α)/B-cell lymphoma-2/adenovirus E1B 19-kDa interacting protein(BNIP3).Methods All rats were randomly divided into Sham,CHF,positive drug(LP),low dose MC,high dose MC(HMC),and HMC+HIF-1αactivator(DMOG)groups.Cardiac function was detected using echocardiography.HE staining,transmission electron microscopy,and TUNEL assay were used to evaluate myocardial pathology and apoptosis.Enzyme-linked immunosorbent assay was applied to quantify tumor necrosis factorα(TNF-α),interleukin-1β,superoxide dismutase(SOD),and malondialdehyde(MDA).Quantitative real-time PCR was used to detect the mRNA levels of Bcl-2 and Bcl-2-related X protein(Bax),while Western blotting was applied to detect the expression of HIF-1α,BNIP3,Beclin-1,and microtubule-associated protein 1 light chain 3(LC3)proteins.Results Compared to rats in the sham group,rats from the CHF group exhibited increased left ventricular end-diastolic diameter(LVEDD),left ventricular end-systolic diameter(LVESD),cell apoptosis rate,TNF-α,IL-1β,MDA,Bax,HIF-1α,BNIP3,Beclin-1,and LC3Ⅱ/Ⅰwith decreased left ventricular ejection fraction(LVEF),left ventricular shortening fraction(LVFS),SOD,and Bcl-2 levels(P<0.05).Compared with CHF group,rats from LP group,LMC group and HMC group exhibited decreased levels of LVEDD,LVESD,apoptosis rate,TNF-α,IL-1β,MDA,Bax,HIF-1α,BNIP3,Beclin-1,LC3Ⅱ/Ⅰ,and increased levels of LVEF,LVFS,SOD and Bcl-2(P<0.05).DMOG attenuated the protective effect of high-dose MC on myocardial cell damage in rats of the CHF group(P<0.05).Conclusion MC improves myocardial cell damage in rats of CHF group by inhibiting the HIF-1α/BNIP3 signaling pathway.
作者
姜帆
周泓屹
王飞跃
孙源
吴广明
JIANG Fan;ZHOU Hongyi;WANG Feiyue;SUN Yuan;WU Guangming(Department of General Practice,Beijing Luhe Hospital Affiliated to Capital Medical University,Beijing 101149,China;Anesthesiology Department,Beijing Tongzhou District Maternal and Child Health Hospital,Beijing 101101,China)
出处
《中国医科大学学报》
北大核心
2025年第7期619-625,共7页
Journal of China Medical University
基金
首都卫生发展全科医学与社区卫生科研专项(2023-2Y-014)。
